local changes
Fix Variable access via varname is deprecated. Use @varname instead
Fix Package[nrpe_packages]: Name must be a String not Array
Fix Variable access via varname is deprecated. Use @varname instead
Fix Package[nrpe_packages]: Name must be a String not Array
Make subnet configurable

Taken from PR2 by @s0enke, rebased with small mods.
Merge branch 'fix_string_not_array'
Merge branch 'fix_redis_host'
Merge branch 'fix_deprecations'